THIS is life expectancy of Poland, since 50s. This is life expectancy in America for the same period.

Throughout almost the entire period America had better life expectancy than Communist Poland. You can even see the upward trend after 1990 in PL once capitalism got introduced and medicine started to catch up with the West.

The primary reason for the apparent rise of life expectancy in the Eastern Block after the 1990s is the fact that, before, the life expectancy was reduced by the premature deaths of the tens of millions with sequels from WW2. About the 1990s, most people who lived the conflict were dead, and healthier people brought up in non-war conditions were the dying cohorts. If you were educated about the topic you'd know, but you're just looking it up right now to support your confirmation bias.

WTF are you talking about, they're the same, with Cuba being horribly lower in 50s and 60s

The Cuban Revolution succeeded in 1959 lmfao. Life expectancy rose dramatically afterwards thanks to the arrival of communism. Anyway, thanks for realizing that the richest country on Earth has similar (but lower) life expectancy than a post-colonial island under the most comprehensive embargo on Earth (carried out by the US).

But they couldn't build sophisticated medical equipment in sufficient numbers

And yet they tripled life expectancy. Yes, again, a country which began industrializing in 1930 and did so with its own resources and labor force, was less technologically developed than the US, which began to industrialize in the early 1800s and did so at the expense of tens of millions of slaves at home, abroad and the natural resources of all of Latin America. That's not surprising to anyone. A better comparison between communism and capitalism would be USSR vs Brazil, or USSR vs Argentina, both of which have more similar starts in 1920 than the US as an already established industrial world power. Now compare life expectancy between 1945 and 1990 for the USSR and Argentina/Brazil.